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TUYERB.

Patented Nov. 20,3333..

yNo. 393,136.

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WITNEEEi NVENTDH- @www PATENT OFFICE..

ROBERT O. YOUNG, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF THREE- FIFTHSTO THE MASSILLON PLACE.

STONE AND FIRE BRICK COMPANY, OF SAME TUYERE.

SPECIFICATION forming part ol Letters Patent No. 393,136, dated November20, 1888.

(No'modcl.)

To aZZ whom it may concern.;

Be it known that I, ROBERT O. YOUNG, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Tuyeres; and I do hereby declare the following to be afull, clear, and exact description thereof.

My invention relates to an improvement in tuyeres for use incupola-furnaces, and is illustrated in the accompanying drawings, inwhich- Figure l is a horizontal section through the wall of acupo1a-furnace, showing the tuyeres, the section being on the line y yof Fig. 2. Fig. 2 is a vertical cross-section on the line x x of Fig. l.Fig. 8 is a perspective view of one of the parts of the tuyere.

Like symbols ofreferencc indicate like parts in each.

In the drawings, Figs. l and 2, 2 represents -the wall of the furnace, 3is thejacket which incloses the wall, and 4 is the wind-box. The tuyercsare made of re brick or clay, and consist of several parts, as sh own inthe drawings. The inner sections, 5, are at tiles, whose edges areinclined so as to conform with the radial lines of the furnace. Thefaces of the sections 5 are grooved, and, when superposed, the groovesform the hollow bore or passage of the tuyere. At the back ofthesections 5 are other sections ,6,which are similarly superposed andgrooved, and whose bore forms a continuation ofthe bore of the sections5 in the same lines therewith. In order to break joint with thetile-sections 5, the sections 6 are made of less width, and other tile,7, are built in the wall to fill up the spaces. The tiles 5 and 6together form the tuyere, which at the front end opens into the furnaceand at the rear is in communication with the wind-boX.

My reason for making the tuyere in four sections is that the innersections, 5, being more directly exposed to the heat ofthe furnace, burnout more rapidly than do the outer sections, 6, and may be removed fromtime to time without need of renewing the outer sections. In this way Iget a distinct saving in the cost ofthe tuyere.

As shown in Figs. 1 and 3, the grooves in the faces of the tiles aremade at such an inclination that the bore of the tuyere shall be daredinwardly-that is, it shall be wider at the inner end than at the rear orwind-box end-and shall graduallytaper from one end to the other.

Tyeres of cupola-furnaces are apt to become clogged with molten metalfrom the interior of the furnace, and when that happens with the tuyeresheretofore in common use it is necessary to d rop the bottom ofthecupola, remove thefuel and charge, and, after cooling the furnace, thechoked tuycre is torn out and another tuyere substituted. Besides theloss of metal occasioned by this operation it causes a loss Of time andan outlay of considerable labor and money. All this is avoided by theuse of the inwardly-flaring brick tuyere, because the clogging metal canbe forced out by a tool inserted into the tuyere from the outside, andon account of the easly-frangible nature of the brick the adhering metalwill chip Off on the inside, so as to allow the easy discharge of themetal Without damaging the body of the tuyere, as it would were itmadcof metal.

I claim- 1. As a new article of manufacture, a hollow inwardly-flaringbrick tuyere for meltingfurnaces, substantially as and for the purposesdescribed.

2. As a new article of manufacture, a hollow inwardly-flaring bricktuyere for melting-furnaces, said tuyere being' made Oflongitudinally-divided sections, substantially as and for the purposesdescribed.

3. The co1nbination,with a melting-furnace, of a sectionaltuyerecomposed ofthe inwardlyconcave bricks 5 5, set in thefurnacewall,one abov'e the other, and similar bricks, 6 6, set Outsideof the bricks 5 5, all of said bricks together constituting a continuoustuyere, substantially as and for the purposes described.

In testimony whereofl have hereunto set my hand this 14th day of April,A. D. 1887.

y ROBERT O. YOUNG.

Vitnesses:

GEO. SMART, HARRY BARNEs.

